Collapsible bag



FIG. 1 is a top perspective view in collapsed condition of the collapsible bag, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is an opposite side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is another perspective view thereof, showing an expanded position;

FIG. 9 is a top plan view of the expanded position of FIG. 8; and,

FIG. 10 is a bottom view of the expanded position of FIG. 8.

The dashed lines shown are understood to represent fold line borders. 

I claim the ornamental design for a collapsible bag, as shown and described. 